<!DOCTYPE HTML>
<!--
     Any copyright is dedicated to the Public Domain.
     http://creativecommons.org/publicdomain/zero/1.0/
-->
<html><head>
  <meta charset="utf-8">
  <title>Reference: Fragmentation height:auto grid with first grid row at top-of-page and box-decoration-break:clone</title>
  <link rel="author" title="Mats Palmgren" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1144096">
  <style type="text/css">
html,body {
    color:black; background-color:white; font-size:16px; padding:0; margin:0;
}
body { overflow:hidden; }

.columns {
  position:relative;
     -moz-columns: 5;
      -ms-columns: 5;
  -webkit-columns: 5;
          columns: 5;
     -moz-column-fill: auto;
      -ms-column-fill: auto;
  -webkit-column-fill: auto;
          column-fill: auto;
  border: 2px dashed;
  margin-bottom: 5px;
}

.block {
  border:5px solid;
  border-top-width:0;
  border-bottom-width:10px;
}
.grid {
  display: grid;
  grid-template-columns: 30px 30px 30px;
  grid-auto-rows: 50px;
  grid-gap: 12px;
  border:5px solid;
  border-top-width:0;
  border-bottom-width:10px;
}
span { background:lime; border:1px solid black; }
x { display:block; height:20px; }

.t { border-bottom-width:0; }
.b { border-top-width:0; }
br { page-break-before:always; break-before:always; }

</style>
</head>
<body>

<div class="columns" style="height: 120px/*fragmentainer ends in the end border*/">
<div style="background:grey">
<div class="grid">
<span><x></x></span>
<span class="t"><x></x></span>
<span style="background:cyan" class="t"><x></x></span>
</div>
<br>
<div class="grid">
<span><x></x></span>
<span class="b"><x></x></span>
<span class="b" style="grid-row:1; grid-column:3; height:11px; background:cyan"><x></x></span>
<span style="grid-row:1; grid-column:3; align-self:end; background:pink"><x></x></span>
</div></div></div>

<div class="columns" style="height: 8px/*fragmentainer ends in the end border*/">
<div style="background:grey">
<div class="block">
</div></div></div>

<div class="columns" style="height: 10px/*fragmentainer ends in the end border*/">
<div style="background:grey">
<div class="block" style="height:1px;overflow:hidden"></div>
<div class="block" style="height:1px;overflow:hidden"></div>
</div></div>

<div class="columns" style="height: 90px/*fragmentainer ends in the last row*/">
<div style="background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span style="background:cyan" class="t"><x></x></span>
</div>
<br>
<div class="grid">
<span class="b"><x></x></span>
<span class="b" style="grid-row:1; grid-column:1; height:11px;"><x></x></span>
<span class="b" style="grid-row:1; grid-column:3; height:11px; background:cyan"><x></x></span>
<span style="grid-row:1; grid-column:1; align-self:end; background:pink"><x></x></span>
</div></div></div>

<div class="columns" style="height: 60px/*fragmentainer ends in the grid gap between the rows */">
<div style="background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span style="background:cyan" class="t"><x></x></span>
</div>
<div class="grid">
<span class="b"><x></x></span>
<span class="b" style="grid-row:1; grid-column:1; height:11px;"><x></x></span>
<span class="b" style="grid-row:1; grid-column:3; height:11px; background:cyan"><x></x></span>
<span style="grid-row:1; grid-column:1; align-self:end; background:pink"><x></x></span>
</div></div></div>

<div class="columns" style="height: 30px/*fragmentainer ends in the first row*/; margin-bottom:30px">
<div style="background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span style="background:cyan" class="t"><x></x></span>
</div>
<div class="grid">
<span class="b"><x></x></span>
<span class="b" style="grid-row:1; grid-column:1; height:11px;"><x></x></span>
<span class="b" style="grid-row:1; grid-column:3; height:11px; background:cyan"><x></x></span>
<span style="grid-row:1; grid-column:1; align-self:end; background:pink"><x></x></span>
</div></div></div>

<div class="columns" style="height: 0px/*zero height fragmentainer*/; margin-bottom:60px">
<div style="background:grey">
<div class="grid">
<span class="t"><x></x></span>
<span class="t"><x></x></span>
<span style="background:cyan" class="t"><x></x></span>
</div>
<div class="grid">
<span class="b"><x></x></span>
<span class="b" style="grid-row:1; grid-column:1; height:11px;"><x></x></span>
<span class="b" style="grid-row:1; grid-column:3; height:11px; background:cyan"><x></x></span>
<span style="grid-row:1; grid-column:1; align-self:end; background:pink"><x></x></span>
</div></div></div>

</body>
</html>
